Catalogue of the collections / Comp. by E.M. Holmes.

  • Pharmaceutical Society of Great Britain. Museum
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Catalogue of the collections / Comp. by E.M. Holmes. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    Glucosides. 489. Jalapin. C31 H30 016. a. Powder. Note.—This glucoside is insoluble in ether. It is resolvable into crys- tallizable jalapinol and glucose. 490. Meconin. C10 H10 04. (Opianyl.) a. Small prismatic crystals. h. A magnificent specimen crystallized in a glass basin. Note.—Specimen b was presented by Messrs. Morson & Son. 491. Phloridzin. C21H24 O10, 2 H3 0. a. Silky crystals. Note.—Obtained from the root bark of apple and cherry trees. It is resolvable into phloretin and glucose. 492. Picbotoxin. C12H1405. a. Crystalline powder. Note.—This substance reduces cupric oxide like the sugars, but to a much smaller extent. Pharmacographia, p. 31. Its constitution not having been as yet satisfactorily ascertained, it is placed among the glucosides for convenience only. 493. Pipeein. C5 H101ST, Ojj H9 03. a. Yellowish crystals. Note.—This substance is sometimes considered as a weak alkaloid, but it has no action on litmus paper, and does not unite directly with acids. It has the constitution of a piperate of piperidia. See P. J. [3], vol. vi., p. 315. 494. Salicin. C13H1807. a. Crystalline powder. b. Saligenin. Note.—Salicin is resolvable into saligenin and glucose. Saligenin is a diatomic phenol-alcohol; see p. 211. 495. Samadeein. a. Deliquescent yellowish powder. Note.—This specimen was presented by Dr. De Vrij, who obtained it from the bark of Samadera indica, Gffirtn. He supposes it to be a gluco- side. Its formula is not yet ascertained. See P. J. [3], vol. ii., p. 645. Examined by Mr. Hutchinson, student in the laboratory, its solution proved neutral to test paper, and yielded no precipitate with perchloride of platinum, iodohydrargyrate of potassium, or biniodide of potassium, but a granular precipitate with perchloride of gold, and a light yellow one with phosphomolybdic acid. Fehling's copper solution was not precipi- tated by it unless it had been previously boiled with an acid. 496. Santonin. C15 H18 03. a. Small crystalline scales. Note. — Santonin is resolvable into santoniretin and glucose. See Pharmacographia, p. 349 ; Attjield, Chemistry, p. 472.